<template>
    <div style="background-color: pink;">
        {{ message }}
        <button @click="greet()">问候</button>
    </div>
</template>

<script>

export default {
    data() {
        return {
            message:'hello,friend!'
        }
    },
    methods: {
        greet(){
            this.message='hello,'+this.$attrs.name+'!'
        }
    },
}
</script>